There may not be much difference between the two. Being conscious is usually defined as being awake (think of a 911/000/112 operator asking you 'is he conscious?')...but it's recognised that sleep walkers, even though they have a seemingly wakeful state (eyes open, walking) aren't conscious of what they are doing. Consciousness could therefore be described as awareness.
The problem with describing it as awareness is, many of the things we do are done at a subconscious level - ie. we are unaware of the processes going on that allow us to do certain things (like walking, balance, language construction, motor skills etc). Writing probably the thing that gives us the most insight into awareness - we think about what we want to write, but not at all about HOW we are writing (or at most, and usually only if we are concerned with neatness...barely do we think about 'how') . Strangely enough, it is for this reason that writing can quite accurately tell us a lot about any one person (even if you have never met them before).
So, often we are conscious of what we want to do, but not how we do it, or (often) why we do it.
It is the learning of the 'why' that delves into self-awareness. The reason this may be be hard to separate from consciousness is that, once you learn the reasons for why you do things, you decisions become a lot more 'conscious' (thoughtful, considered, weighed up etc). Therefore, is it possible that self awareness is needed for any form of consciousness...with the degree of self-awareness determining the degree of consciousness?